Elastic fluid turbine packing arrangement



April 30, 1940. G. w. STROEBEL ELASTIC FLUID TURBINE PACKING ARRANGEMENTFiled larch 29,- 1958 Fill bill" w v M 5 w w M .s H

' Inv emtoP: George by JV Umrso stares PATENT OFFlCE ELASTIC FLUIDTURBINE PACKING ARRANGEMENT George W. Stroebel, Schenectady, N. Y.,assignor to General Electric Company, a corporation of New YorkApplication March 29, 1938, Serial No. 198,669

1 Claim. (01. 286-10) The present invention relates to elastic fluidshaft into the chamber 25 is drained therefrom turbine packingarrangements for reducing leakthrough suitable openings, not shown. Thesupage of elastic fluid along the shaft past the turport l8 and a ring26 held thereon also form bine casing. More specifically, the inventionrepacking surfaces with the shaft I to reduce lates to the type ofpacking which includes the leakage of lubricant from the bearing 20along 5 combination of vapor and liquid sealing means. the shaft intothe water packing chamber.

Thus, in the casing of a steam, turbine this com- An important featureof my invention is the bination preferably consists of a combined steamprovision of a flexible seal between the water and Water P king. packingand the steam packing. This flexible 10 The object of the invention isto provide an seal comprises an annular sealing member 21 10 improvedpacking arrangement whereby an elasmade from laminated sheet metal. Thesealing tic fluid turbine may be effectively sealed. member 21 has outerand inner concentrically For a consideration of what I believe to bespaced cylindrical Walls connected by a curved novel and my invention,attention is directed to 1 wall. During manufacture of the sealingmen-rthe following description and the claim appended ber a number ofsheet metal rings are spun over 15 thereto in connection with theaccompanying a form to a channel shape. The edge of the outer drawing.cylindrical wall of the member 21 is secured to In the drawing, Fig. 1illustrates a sectional a flange 28 by means of a ring 29 and a weld 30.view, partly broken away, of an elastic fluid The flange 2B is fastenedto the turbine-casing turbine packing according to my invention, and bybolts 3l.' The edge of the inner cylindrical 20 Fig. 2 is an enlargeddetail view of Fig. 1. wall of the sealing member 21 is secured to a Thearrangement comprises a turbine shaft Ill clamping ring 32 by means of aring 33 and a projecting through an opening in a turbine casweld 34, theclamping ring 32 being clamped being II. The bucket wheels, not shown,are setween the water packing casing halves l4, I5.

cured to the shaft on the right-hand side in the With this arrangement achamber 35 is formed 25 drawing. The packing comprises an elastic fluidbetween the water packing casing and the turbine or steam packingindicated by a single toothed casing for receiving fluid leaking pastthe steam packing element l2 held on the casing II with packing l2, l3,fluid being discharged from the its teeth in cooperative relation with agrooved chamber 35 through a discharge opening 36.

shaft portion l3. A liquid or water packing Thus, with my invention theleakage of elastic 30 arranged adjacent the steam packing comprisesfluid past the steam packing into the power plant,

a Water Packing asing having w ves or p01 that is, into the atmosphere,is completely pretions I4 and I5 forming a chamber l6. An imvented.During operation, the water packing D dEfiECtO! l 7 is disposed in thechamber casing due to its lower temperature expands at a I6 and securedto the shaft It. The water r t difierent from the expansion of theturbine 35 p kin c in h lves l4, l5 re secured to a casing. Excessivestresses and strains due to pp Which in turn is e y b c et 9 suchdifference in expansion are prevented by the O th turbine Casing IL Theb ac ts 9 a provision of the flexible sealing member 2! beform a supportfor a shaft bearing 20 for the lefttw th t bine casing l l and,- thewater pack- 40 hand end portion of the shaft Ill. Water is suping casingI 4, l5. i 40 pl ed to e te p c Cha l6 thrOllgh What I claim as new anddesire to secure by a conduit 2! connected to a channel 22 formed L tt'p t nt, of the United States is:

in portion of the Support a d e Cas A sealing arrangement betweenconcentrically halves l4, IS. The water packing casing halves spacedwalls comprising an i n and an outer l4, have inner grooved Surfaces inpacking wall concentrically spaced, a sealing member U- 45 agem'entwith, the shaft to reduce leakage of shaped in cross-section andcomposed of several water from the water chamber l6. -U-shaped sheets offlexible material having par- D rin operation, water pp to h h mallelinner and outer legs with the inner leg enber i6 is rotated by action othev pe 170 f gaging the inner wall and the outer leg engaging a Seabetwee t e latter d e Walter packing the outer wall, and means forsealing the legs to casing- The Waller is discharged thrmlgh a Suitthewalls comprising inner and outer rings par- 811 8 Opening (110$ Sh0WI1)-The Walter Packing allel to and engaging the legs of the sealing mem- Cahalf l5 together with a toothed packing ber opposite to thecorresponding walls and anmember 24 held on the support form a ate nularwelds securing the edges of the sealing drain chamber 5- Wa e ea n P thep member to the corresponding ring and wall. 55

ing surfaces between the casing half l5 and the GEQRGE w, S'IROEBEL

